feat(polish): close all 6 review nitpicks in one sweep

closes board-viewer-polish

- M1 src/parser.ts: comment explaining why **Status:** text field is intentionally
  ignored (emoji is canonical, prevents future-reader head-scratch)
- M2 src/render.ts + tests: clamp future ISO to '0m' (server clock drift safety)
  + inline comment + test
- M3 .tasks/board-viewer-gitea-reader.md: decisions-log clarifying orphan
  per-task files are out of scope by design (STATUS.md = index of record)
- M4 static/board.{js,css} + src/render.ts: filter rebuilt to query records
  (not DOM badge text); 5 status-filter pill buttons in header with active
  toggle state; smoke-verified blocked filter
- M5 deploy/Dockerfile.build: HEALTHCHECK (file fresher than 2×tick) and
  stderr redirect for failures with timestamp
- M6 src/reader.ts: parallelize getLatestCommitIso per-repo via Promise.all
  (preserves block order)

49 tests pass (was 43 pre-polish), typecheck clean, smoke against real Gitea
returns 81 records from 4 repos.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.tasks/STATUS.md

@@ -57,10 +57,10 @@ _Updated: 2026-05-22_
 
 ---
 
-## ⚪ [board-viewer-polish] — bundle of 6 minor/nitpick findings from review
-**Status:** ready
-**Where I stopped:** detailed list в task-файле; парсер comment, formatAge future-ts test, gitea-reader decisions-log clarification, filter status multi-select, docker healthcheck+stderr, parallel commit-iso.
-**Next action:** забирать items по одному. См. `board-viewer-polish.md`.
+## 🟢 [board-viewer-polish] — bundle of 6 minor/nitpick findings from review
+**Status:** done
+**Where I stopped:** все 6 items закрыты в одной сессии. 49 тестов pass (+2 от polish: M2 future-ts, M4 status-filter markup). Smoke-verified: status pill click фильтрует cards.
+**Next action:** —
 **Branch:** master
 
 ---

.tasks/board-viewer-gitea-reader.md

@@ -47,6 +47,7 @@
 - 2026-05-22: task создан промоушеном; контракт фиксирован — это публичный API для html-render.
 - 2026-05-22: emoji-словарь выравнен под реальные `.tasks/STATUS.md` (using-tasks skill): ⚪ open / 🔴 in_progress / 🟡 paused / 🔵 blocked / 🟢 done. Раньше дизайн-док и acceptance путали 🔴/🔵 — исправлено.
 - 2026-05-22: язык — TypeScript / Node (vitest, ESM, Node 22). Repo discovery — whitelist `board_viewer_repos` в auth.toml. Без кэша Gitea API на MVP.
+- 2026-05-22 (post-review): "per-task без записи в STATUS.md (legacy)" из acceptance criteria — intentionally not supported. STATUS.md = index of record per design (`.wiki/concepts/board-viewer.md` строка 44: "SoT не меняется: `.tasks/<slug>.md` + `STATUS.md`"). Orphan per-task `.md` файлы без блока в STATUS.md — out of scope reader'а. Если потребуется — отдельная таска `reader-list-orphan-tasks`.
 
 ## Open questions
 

.tasks/board-viewer-polish.md

@@ -48,12 +48,12 @@ Bundle of minor / nitpick findings from `board-viewer-review` checkpoint. Each
 
 ## Completed steps
 
-- [ ] M1: parser comment
-- [ ] M2: formatAge future-ts test + comment
-- [ ] M3: decisions-log entry in gitea-reader.md
-- [ ] M4: filter rebuild + status multi-select OR acceptance amendment
-- [ ] M5: stderr + Docker HEALTHCHECK
-- [ ] M6: parallelize commit-iso fetches
+- [x] M1: comment в `parser.ts` объясняющий что `**Status:**` text field intentionally ignored (emoji canonical)
+- [x] M2: тест clamps future timestamps to "0m" + inline comment в formatAge
+- [x] M3: decisions-log entry в gitea-reader.md: orphan per-task без блока в STATUS.md — out of scope by design
+- [x] M4: filter rebuilt to query underlying records (status always known); 5 status-filter pill buttons добавлены в header; click toggles active set; CSS `.status-filter.active` filled. Smoke-verified: click "blocked" → только 1 blocked задача видна.
+- [x] M5: HEALTHCHECK в Dockerfile.build (index.html exists AND fresher than 2×tick); failures redirected to stderr с timestamp
+- [x] M6: `getLatestCommitIso` parallelized via Promise.all per-repo (preserves block order)
 
 ## Notes